Art of making grooved pins and the like



y 1945. F. w. BRAENDEL ETAL 4 2,376,335

ART OF MAKING GRO'OVED PINS AND THE LIKE Filed Jul 22, 1942 4 Sheets-sheaf 1 v INVENTORS lblz'a: l V. fi 'uezzdel CeczJJ C. Kan/cards l I Y 6 v ATTO R N EYS y 22, 1945- F. w. BRAENDEL ET AL ART OF MAKING GROOVED PINS AND THE LIKE Filed Jilly 22, 1942 4 Sheets-Sheet 2 INVENTORS ilx Wflraendel Cecil CKab/zar'ab" May 22, 1945.

F. w. BRAENDEL ETAL ART OF MAKING GROOVED PINS AND THE LIKE Filed July 22, 1942 4 Sheets-Sheet s i a IN ENTORS Felix h flraendel Cecil C(Kickards ATTORNEYS Patented May 22, 1945' STATES i P-ATEENTI' mamce fiRT OFMAKING enoovnn' rms AND Thiamine JFelix;'W. Braendel,.Union Gitmandfieciliflharles Bichards, LWest New York, N L, assignors to Gram-Pin" Corporation, UniolfCitmN.J.;a'corporatiomof New? York t hp iiemiunrJumzz, me eiar mittens-s when fthe transfer riiechanism which-"picks up i the 1 work F-and rnoves it to the milling --equip- "m'eht; seourely reta'ins itdurin'g the milling :op'erati'omam'd themreturns -and releases the finished piece; as a fresh bieoe is pioked up by thetransfer "mechanism. 7

It is among the objects of the inventionrgreafly I holding mechanism by considerable -simiflificati-en in themonetruction thereofand reduction in the we-i@ht-"=and -inertiaof the i moving 1 parts to =render the machine *more speedy in operation, "lfid ilso to simblify and 'reiidermore seeure anci accm" te the' lo'cking or' chuekingof tl'ie work in rth'e ih 1mg operationfito eliminate sliding*fpatrts ei-large area arfd thedifilcfllty ofiubricating the ssame, to 1in'iinate*the di'sturbance in operation -fdue to the aceumulatiomof metaPchips-on the men of the -maehi-ne, and -"fina1ly to rerider 'the parts "of the machine more readily accessible,

\v'ithoiit increase its overeilldimehsions.

-W1 1i1e the invention findsits preferred applicationas animprovement of the machine set f oi'th, it wi11 be' understood that its principle afid constructiomare applioable to 'other"machines.

In-the drawingsin -;v'v1'-ii'ch'-'is 'showrr'one" of variousapossibleernbddimentsmf the 'several" features eft t'h'is invention,

Fig s a'plan-vi'ew of-the machine,

FigF Z is a sideielevation thereof,' V FigFS is a transverse sectional view on anenlergedscale, taken on1in3- -3 of Fig; l, Figr lfism View on a largenscale with portions in section-of the parts 'showmat therihtbfFigTZ,

and

-ti0n, ibyhaz-wire; feed t2 f-f-or the tend :to :ahutethe -stopegange I13. ,rShearingameohanEm HI touts off ide'siredi lengthsa-ofvwire and shiftstthe sameginto ;:alignmentvwith theggrooving die-'15 into whichtit :is pushed itbyIg-pnsher V v-mechanism I56 :zroperated 1 from :enank i H. v The successive severed y Jengths rofcwire:orslrotheriworkipieces areqirouted inrregular sequence to a plurality of milling equipments 'avhichxinherentlytoperate :more aslowly z'thamthe 1:.) vcuttingrand'zgroovingainstnumentalities; andlaconointly :or:.colleetivelyznperate; at thecspeedwfisaid :ifiastemoperating:instmmentalities. 1 v v iIn-z thetqarticularmambodiment-shown, the :rsevs-erednand :tgrooved Spins sremerges: from the ignoov- 1 5 ingfidiewthrougba discharge: tube ['82 to :be-ztaken our 21. mTra-nsfer carriage cshiftsweveryqother egroovin "dieudischarge M8 to rxberendgmilledibe- 20 tween*.=the 'opposedsxpair of; end Lm'illing vheads rI-I1 'iandl H2 at one sidesofzthe:groovingcdie discharge. The other:transferscarriageqfl l rshiftsithei intervening:altermite':v pins .I(i.=:,e., Lthesecond, fourth,

beuendu'miiledi betweentia :corresponding; pair fcOf like i en'dnrnillingv :heads LLH3IZIaIld H4 similarly arnangediat ttherother side'rof: :saidu'd-ischarge. ens

ithe:companion;caseg guidettracks3:22ilatenally aof ltheal grooving: :die :idischarge sserve to shift the respective pins longitudinallyiin: theichuclntoadisposeizthe same; symmetrically :oftthe'zohuc'k'. (herehatter;toi-be'describ emtsozthatt theybecomerprup- JerJyIeentere'G between; the :end millingzcuttersifi. IIhe inventions asiithus .faradescribedsismot. "per se claimed herein as it is part of thezsu'bject matter-of: the earlier-application vaboveaidentified.

: in the :zpresent application, 1 a single zeleotric motor ld constantlyidrives thetwo end-:milling sszheads H LHScatuthe extremityof thewbedriand I'dOESlIthiSTthI'OughibGltS: 25 :and r26 crespectively.

JaA companionielectric motor) 2'Fnasimi1ar1yidrives the remainingirtwo end milling *headsfiiz :andrHr respectivelyi opposed: to: those "jnstrset fortlrzbysa seminar-arrangement Ofiblts 2B. The'ttwo'fmilling heads thatfloperatehon opposite ends :.ofa:one 2 pm (i. e.,I-I1 andeH2 aswve'll asimrr-and Harare =.;driven infopposedztdirectionsh v The particular'pin tranlsfen and" end milling arrangement with which this invention is especially p concerned will? nowiibea hsetiforth.

According toisthe inventionuthe; cam;- shafts-30 from which the pin L transfer land the 1 head-movement (and them-various". locking actions are-controlled, iisifsupponted fin-zhangers'fi I under the bd l 010i thfifififiChll-BBfi-Mdiisfdlivellffl'omiian the chuck 9 om the" transferi'carriagerm electric motor (not shown). The pin transfer carriage in the present invention comprises a lever or arm fulcrumed or pivoted at its lower end at 32 in bracket 33, its upper end protruding above the bed through a. longitudinal slot 35 therein. A drum-type cam 36 upon the cam shaft 35 affords a track 31 for cam roller 38 upon the transfer lever 20, thereby to bring about the oscillation of said lever from the position shown in full lines (Fig. 3) in which it takes on the work, to transfer it to a position of axial alignment between the end milling heads H1 and H2. As indicated, there are two companion cams 36 and 36' and transfer carriage levers 20 and 2| are so relatively arranged and timed that the movement of each lever from the end milling position to the work pick-up position and return to the end milling position occurs while the companion transfer lever is in stationary position for end milling of the pin carried thereby. Each end milling head (H1, H2, H3 and H4) includes a rotating shaft 40 driven, from the corresponding drive belt and carrying the end milling tool 23 in a chuck 23 at the milling end. The shaft 40 is lodged in a journal 42 presenting shoulders 4| that mount the ball bearings 4| and said journal is slidably lodged in a jacket 42'.

A work gripping base 43 that includes an anvil plate 49 is bolted at 44 upon the correspondingly shaped upper end 34 of the transfer lever. Said base 43 has a unitary upstanding lug 45 with means, desirably an eye 46 at its upper end that serves for locking the transfer carriage in end milling position in manner to be described herep inafter. Pivoted to the lug 45 is a lever 41 which carries a chuck piece 48 and a connecting coil spring urges the chuck to closed position, resiliently to grip the pin 10 or other work when the same is fed into the chuck from the discharge outlet I3 of. the grooving die IE or other working tool or work delivery appurtenance.

.firmly to grip the pin p or other work at that stage in order to retain it against displacement during the end milling operation.

Means is provided for locking the transfer lever when in machining position against rocking about itsfulcrum, and it is also held against shifting or bending in direction at right angles to its fulcrum axis. i

- For locking the transfer carriage lever itself in end milling position, there is provided a cam .positioned member, desirably a latching bolt 53 mounted in bearings 54. Said bearings are on standards rising from base 8!] from which rises also the standard 8| that serves as a support for the extreme end of the bolt 53 when in latched position. When the transfer lever is in its extreme outermost or end milling position, its eye 46 is interposed between standard 8-| and the contiguous standard 54, for the bolt end to pass through said eye in its traverse from the bearing in said standard 54 to the bearing in standard 8|.

The right face of standard 8| and the left face of contiguous standard 54 are provided with rings 1" through which the latching bolt 53 extends, which rings afford but slight clearance with respect to the sides of eye 46 on lever 20,

.so that any rocking or bending of the latter about an axis at right angles to its pivot 32 is substantially prevented. The rings 1 are beveled as shown, s0 that the upper part of the lever readily enters between them. The chuck carried by the lever is thus securely retained against movement in any direction during the end milling operation, for it is held by bolt 53 against shifting about the pivot 32 and by rings 1 against shifting along the bolt 53.

For operating the latch bolt 53 in timed relation, it is provided with a head 55 tightly clamped at 55, about the bolt 53. An operating cam 57 'upon the shaft 35 serves to move the latching bolt through a bell crank lever 58 pivoted at 60 upon bracket 59, one arm 6| of which comprises a cam follower, and to that end has a roller 62 riding upon the cam, the other arm 53 thereof having a pair of segment shaped plates 64 fitting into a corresponding fiat circular recess in the lower end Of ibolt head 55 and held in place by screws 65 through a cover 65 against the lower face of said head.

t the outer end of the cam follower arm 5| is pivoted a drawbar 55 arranged to slide through a corresponding bore 57 in bracket 68 and a powerful coil spring 53 hooked to said drawbar urges the same downward to press the follower roller 62 against the cam 51. Thus, as the cam rotates the spring 65 pulls the bell crank lever 58 downward against its depressed part 51 and correspondingly pivots lever 53 counterclockwise in Fig. 4 to move the bolt 53 into and through the eye 46 of the transfer lever 20 which had previously been moved to its extreme or end milling position snugly between disks r, for entry of the extremity of said bolt 53 into the bearing in standard 8|. The curve of the cam 51 is such that the transfer lever is kept in latched position throughout the end milling operation.

The end milling is controlled by the movement toward each other of the end milling heads H1 and H2 between which the workpiece is held for such end milling. Desirably, the same cam 51 which effects the latching also controls this movement of the end milling heads. To this end a yoke ill pivoted at 12 on a bracket 1| straddles the extension 13 of the journal 42. The stem 14 'of the yoke extends downward below its pivot bearing 12 and is pivotally connected by means of a link vl5 to a wing 16 on the lower end of the drawbar 56. A like construction of link 15 and yoke 14' shown broken away, is symmetrically arranged for control of the other end milling equipment H3, Hi. It will immediately be seen that as the follower arm 6| is urged downward by spring 69 to keep the cam roller 62 in contact with the depressed part of the cam the downward movement of the drawbar 66 causes the links 15 and 15' to push the stems 74 and 14, of the yokes l0 and 10 apart and correspondingly to move the forks of said yokes inward about their respective pivots 12 to bring the end milling tools in engagement with the work and to advance the same toward each other as the end milling occurs in the continued rotation of the milling tools. As the rise. 51 of the cam 51 reaches the cam roller 62, the cam follower arm BI is lifted about pivot 60 and arm 63 moves outward to withdraw bolt 53 from the bearing in standard 8| .and from the eye 46 on the transfer carriage. The simultaneous lifting of drawbar 56, will cause the milling heads H1, and H2 at the same time to recede from each other away from the interposed endmilled pin p The drum cam 36 now becomes eife'cti'tetoviitlidraiv the transf d ter "bolt jand yoke describedand shgwn afitheleft di plieated at the right side of thefrnachine, corresponding parts bearingthe same reference "numerals priiried. e H Atll is shown 'a'n adjiistmentff ordetermining the initial position of the ektension T3 jourfnfal 5g and the end mining head" harried there- The i etanskrfgeeoinm be desei'ibed, "since they eorrespor d elosely to the showing in our o n l p icei n' l, v a a fMe Y i im v d l adiuj m i ef thfij i h' ingf'bolt; 53 to assfir ac' rate eehteifni ther or withiespect to the feye 45. N The 1 1' th ongh tran'sverse elongate slots l r1 7 e n hat it" to rm t mh i i e -h "A ust- 'irie' ntat' the shiftlever end 63 is effebtejdbya hub 53" in the head 55, which has "laneebentriefbore thathouses the bo1t'"5 3. Hubf53' is turned from its flangeSB tope'ri'nit adjustment 'onforming "tq'ithathf basef80. e e v Means is provided for adjusting the niaehine "for prodii'cing pins ofJany desired length, To this enfd'the work gripping base l3jis adjiis table rt et the' d stanc of the ehujck eh the transfer lever *with respect to the grooving diefdisharge l8. To this "end "gripping base 43 has elongated" slots (not 1 shown) for; serews 44 'Ifhe base 80 has alongitndinal key ,mo int 8| on the bed I ll so that said'bas'e niay -be moyed; longitudinallyf and tightened in adjusted position in w n d s T W iam h new when t transfer lever is memm111m pos1tmn,' and cam stop 5'2 onsaidbaseiilillbein the "path-tr roller 5|.

The operation will'jloev from theforegoing description, butiyill be briefly siimmarized. "As aresult of the operation of those parts/ of themaehine that Werebriefiy described in the foregoing, when the transfenlejer 'ZO is i n extreme or take-on position, the work, shown in the form "of a short pinp, is pushed into-place between anvil plate and gripping lever 41. v lIhe spring "50' keeps the pin: in position as the driim cam 36 pivots said transfer 'lever {outward to interpose the pin into alignrrientbetweenthe "051 98641 end milling twi ts of heads l-l fand H2. Inthe traverse of the ti'ansf erde ieroutwardto endlmilling"{position the ends of the springheldfgrooved pin or workpieeefnioye along the'inclined tracks2 2 and are thereby pushed into f symmetrical position ire spent fto the transfer lever by which they are-carried. As the transfer lever reaehes'itslextiieme position, roller 5| thereon reaches the eam stop5 2 to be thereby pivoted slightly, firmlytoelamp'the pin 'i'nposition. e e A "As the transfer carriage 'reaehes itsoutermast position, itseyei w nter b tween the disks 1""as the depressed 1 portion 51 of the cam 51 "moves toward theffrollenBZoandithejspring 59 H tpivjots the bell erank'levertflto move the bolt "53' as shown in Fig. '4 to theleft'to traverse and boltftheeye 46, the extremityfof 'boltf5 3 entering theborefinstandardjfil; thereby-tolock v the" transfer lever earriage firrnlyhinposition, so 1 that there isno'poss'ibility otdisplacing the pin p lokedxthereon in the eduise of theend min 'ing operation. 1

As "the dra th 'd a i e-ioiih ia 15, start; caii'singthe barfiili is springqired downward 5 i a eiit sr m f the 'yokeslll,

iihati t iz e A e fled, for higher productionahdtthis ihith-a niini- 1-15 6f shtick, impafctfind WiI Gf the machine parts; "The "latch 'b'olt construction for loking the transfer carriagein end mil-ling spositi'on "is "also considerably simplified I as compared to the "prior eonst-riictionand' is in'hrently accuratewmd precise. The simple 'bolt='53*bycoactionwiththe eye 46 of the l pivoted transfery carriage lever, in turn I positioned -;-between disks 1" -inherent1y*affords' a secure lock inall directions. The transfercarriages moving freely through slot 1l' bed I'O, :there is nodanger of -fouling--slid;ing

bearing parts with chips; of metal and the probleni' 'of lubrieating sueh sliding {carriagejparts; is eliminated. The machine presents a relatively --open and uncrowded bed afiordingready-access to va ious Pa a d nwi hq t inc as in the e all dimensions of the machine-showman the 'earlie application.

pp y nalfb al 5r" other"shape'reduired fer" the lar performance in hand.

be uiiderstood thatwhile a sist flie ehie e le te s wn n f rd 55 narily sufiicient, the invention'onldbejenibod work, but operations along the side face of the work adjacent the end are embraced Within its scope, such operations including, for instance, the machining of taper ends or reduced cylindricaltips or the threading of the end portion of the work.

It is of course within the scope of the inventionto machine the work at or near only one end thereof, or to perform operations of different ordistinct character at or near the opposite ends of the pin or other work.

From the foregoing it willappear that the invention is not limited in its application to the preparation of units that serve as fasteners such as the Groov-Pins above identified, .but is applicable to the fabrication of a wide variety of products including rollers for roller bearings, shoulder studs, threaded or unthreaded, door knob spindles and the like.

It will also be understood that if desired the product after it leaves the machine may be fed to another machine of like or different construction for further machining or. processing.

As many changes could be made in the above mechanism and many apparently widely different embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and i not in a limiting sense.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In an automatic machine of the type for performing a sequence of machining operations including an inherently fast operation and a relatively slower machining operation, and having a single equipment for performing the relatively fast operation, and a plurality of machining equipments for operating conjointly at substantially the rate of the fast operating equipment, and means for selectively routing the work in regular succession between the plurality of slow machining equipments and the single fast operating equipment; the combination in which the selective routing means comprises a plurality of levers each equipped with a work holding chuck rigidly mounted thereon and means for moving said levers about the respective fulcrums thereof in' timed sequence between the fast operating equipment and the respective more slowly operating machining equipments, said means being constructed and arranged to position the chuck for each machining operation.

2. In an automatic machine of the type for performing a sequence of machining operations, including an inherently fast operation and a relatively slower machining operation, and having a single equipment for performing the relatively fast operation, and a pair of machining equipments for operating conjointly at substantially the rate of the single fast operating equipment, and means for selectively routing the work alternately between the pair of machining equipments and the single fast operating equipment; the combination in which the routing means comprises a pair of levers, each fulcrumed at one end thereof, work holding chucks each rigidly affixed to the other end of the corresponding lever, cam means for oscillating said levers in sequence between the associated machining equipment and the single fast operating equipment, said cam means affording a dwell for maintaining the work on the end of the lever in position for the slow machining operation.

i 3. In an automatic machine for performing a sequence of machining operationsincluding an inherently fast operation and a relatively slower machining operation, said machine having equipment for performing the inherently fast'operation and having a pair of machining equipments for operating conjointly at substantially the rate of the. fast operating equipment; the combination in which a pair of levers each fulcrumed near one end thereof each has a work carrying chuck rigidly carried by the other end thereof, a work feeder interposed midway between the pair of machining equipments for delivering the work pieces alternately to the chucks, as the latter are alternately aligned therewith, cams coacting with the respective levers to cause the latter to oscillate between the work feeder and the respective machining equipments, and automatic means for affixing the outer end of each chuck holding lever while in machining position.

4. An automatic machine of the character described, comprising a bed, a pair of machining equipments upon said bed, a work feeder midway between said machining equipments and transfer mechanism for picking up the successive pieces of work from said feeder and routing the alternate pieces to the respective machining equipments, said transfer mechanism comprising a pair of levers each fulcrumed at one end thereof, having work-holding chucks rigidly mounted upon the other end thereof, and cams coacting with the respective levers for pivotally moving each from the pick-up position to themachining position, thecams affording a dwell for the latter position during which movement of the companionlever is effected from machining position to pick-up position and return.

An automatic machine of the character described comprising a bed, two sets of machining equipments thereon in substantially parallel relation, a supplyof work pieces to be machined, delivering midway between said machining equipments and transfer mechanism for picking up and delivering alternate work pieces from the supply to the respective machining equipments, said transfer mechanism comprising a pair of levers pivoted below the bed and extending up ward through a corresponding slot in the bed, each of said levers having a work-holding springclosed chuck rigidly affixed upon the upper end thereof, cam means for oscillating said levers in timed relation between the associated machining equipment and the pick-up position, said cam means being arranged to permit substantially the complete oscillating stroke of each lever to occur during the machining operation upon the work held in the other.

6. An automatic machine of the character described, comprising a bed, two sets of machining equipments thereon, in substantially parallel relation, a supply of work pieces to be machined, delivering midway between said pairs of machining equipments and transfer mechanism for pick ing up and delivering alternate work pieces to the respective machining equipments, said trans fer mechanism comprising a pair of levers fulcrumed below the bed and extending upward through a corresponding slot inthe bed, each of said levers having a work-holding springclosed chuck rigidly affixed upon the upper end thereof, cam means for oscillating said levers between the pick-up position and the respective machining equipments, said cam means and the ucrresmmim mw m ntzlofrsaidilcil m bein -s in: timedtreiatiom tn:permittsimstantiallyttheaenti c nsoillatingsstrekeiofieachtleventc-cccun'durin rthe machining: operation upon thmwnnlc: held; in: the: other; and;automaticallyireleasahle-meam;to s e cure: the: upper part: of; the work; tna nsf-eiz lever;

imfixedi'i' positinim during-1; the machinin a: c armtiom i "7%.". An automaticmachinetofi thescharacteirdert the respective machining-f equipments; said cam means andythe comesponding moyement: of: saifl-I levens being inttimedi'relation tmpermitxsubstantvtiallyl the! entireosciliating. stmke. of each level t-m occur during; the machining; operatien 1111011,; the work heldi in the other; andameans t tighten thegripping effectiveness of; the; chuck; upcm the M01115 preparatory:tozanditozmfiz ntainiit ti ht dun ing themachining-openmtion.

'8?- In: apparatus (on the charactevrdeacrihed a d; machining u nment: theneon, a: chuck for: herding: the wotle tezhe machined; means ipn transferring: said? chuck bring; thfii Wonk; in-tq coacti'cn with: the machining equipment te m means; comprising-a mckinga levewiulctiimgd; at:

one: end? with: saidi chuck-rigidly; afiixed atrtheothenanwmeans fnr securelymeta-iningrsaid eye onetendi of?it'sm cachingmovement:imrmite hing position; said! means; comprising: a; cam DQ iJtiQn'ed member blocking: the: movement; ofi the; level} about; its: fulcrum, and meensvliatenaliy Qfi and adjacent. both faces: oi said-1 le /1811" amta the omen-end? t1iBI1e0f-f0rr-b1OQkin the; disnlacemergit ofrsaidz chuck imaidirectiorr at'riglitaneleszwthe pivoting movementxofcthe lever. i

9:: In apparatus air the; chem-star desc ibem bed; machining equipment thereom a chuck for holding the wonlc to: be machineds; means fer transferni'ng. said: ChuCkttQ bring; the war .0- action with. the machining equipmen can meane ccmprising a-inocking, lever fulcrumed one end,

and carrying the: chuckat. the (11111911; 3A cam; .9%

erated bolt rod, means rigid with saidjle veit a-nd near said chuck coasting with said: bait; nod} for r k a l ver; a ainstmcvement; abou ts fulcrum when in machining; position; @ndy flame m pieces mounted? 1113,0111 said bed and- 11 51 5661 nearsai'd bolt and: between which; the-law! 1: ters with small clearance; 011; nneventzing; die: placement ofthe: chuck end 0t: said levee a diiiection lengthwise- 0t? said? bolt;

10 ln appavatus eftheicha-racter descnibedt bed; machining equipment thereon; at chuck for holdingthe Work to be machined; means; for transferring said chuck to bring theworkz into ceaction the machinin equipment, said means comprising a rocking lever fulicnumeci at one-endand carrying the chuck at; the other; a

bolti od upen saidbed, mean-s for shiftin said recite-extend through said leven fo r bolting the lever anti the chuckthereon against movement about said fulcrum, and upstanding: disks affixed m arallelfre c ica, achtequinment av ng 15W? i ith t e .1% equipmez t, ei meme;

and; n ce tine n-i ei a the: QHIQE; lt 951 UQQH: said; bed-aid; paml l il: h it m i:

ai i y k andt o -a 'f in isais i QQi Qr the lever:- wlth i he din h-ucltn 24,1 escribed; he embina at hem. p sa e of: mach nin equipmen mm; aid: bad? an i111. pani -11:21 t tensi mecha iam p m- Di QESJQ'fYJWQXKem' hfii fi gifi mcn si. said; mam paint f: v r ea b aw-the eflfiit flifiix e atin xat huckc z thc eoii o n equ pmen s ach: i SQ E QEBC QSQ LJ W1 membe e nematherh q; Q, actingawith. aid memb r? fi ir i i tei tgi he worhiiii h ehu ls wh t h iet tne T hminew qsitiiqci a d. u. t i .2 cute partwo rsaid EVQITJQIFJI'IS saidm fqh mh tio re emz se i-e ev n cg i ist: dis lacement said: me

1 9 1: heath; SH'QPIY'QLE wcn H ieces, par lle ie and midway between said machining equipmentg, ti ene 1" e ers: f p cn lme ratl he, z cpe ztii Iqwer fi i fir p tlfiflifiQfiWhQMMg rig met oma. c inch er niclsi i t uctc dtne amm War deei eci rom; a dtstupclyt;anctmeana 1 ma n thezneepeet e w n ,betweeni 1 'k pfpo iiiqn thereof and the associated mach mg -eq iipme t heic pe; ea h. Qtsaid M re having an ye rigid het w tia-n an he-1 9E261} d thereefiat IIFQJQI'QF flanking,- ni ccs intimated $55 311 be e ween which sai t r micr e er eatex c h mall le sacnce aelie ent 1 3 f me t." of huck eiiatliw we Q; i t rpm and fe causingqhe wssccia esi meq iniii nmmcnttwec twt th he; et e huec iti nedi 1% 1 h diame er; estt it Iced; a w en we? mi ling ecti tzm nts, h cqn @mmse hera fit. umgly oi wank; g qec. pa al e merits, Mamie cwre flu c ume a lic re time eweit: nds: WWW-ft, ach; having. 1

-11 mounteci: heme! or p kng up arm re,- taining work derived from said supghg; anti g eam fio meme he respec ve leware st cc t he piekm m i imhete wnd the ENQQKQJIQQL em ine itio it dii ingw rip. eni matic. mam-me =0 the cliamctci ttice, ta-i curcez a mie cpb mach n d:

milling equipment therefor, each of said levers having an eye rigid therewith near the upper end thereof, a reciprocable latch rod upon said bed, and means to operate said rod to plug said eye for rigidly positioning the transfer lever in the end milling position thereof, means for automatically tightening the work in said chuck while in end milling position, and means for thereupon causing the associated end milling equipment to coact with the work thus positioned.

15. In apparatus of the character described, a bed, a pair of opposed end milling heads thereon, a rocking transfer lever having an aperture therein, a chuck rigidly mounted on said lever, means for moving said lever to convey the work and interpose and hold it between said heads for end milling, said means comprising plugging means parallel to said bed, means to operate the same for locking the transfer lever against pivotal movement during end milling operation, means flanking said lever in end milling position to prevent displacement of the chuck in direction at right angles to the pivotal movement of the lever, and means in timed relation with said plugging means for engaging the end milling heads with the endsof the interposed work piece to be milled.

16. In apparatus of the character described a bed, machining equipment thereon, a chuck for holding the work to be machined, means for transferring said chuck to bring the work into coaction with the machining equipment, said means comprising a lever fulcrumed at one end, said chuck being adjustably mounted upon the other end of said lever for varying the position thereof in direction lengthwise of the fulcrum for adaptation to the length of the work to be machined, said lever having a locking eye rigid with the upper end thereof, a base on said bed having standards rising therefrom, a bolt rod in said standards, two of said standards having disks on adjacent faces thereof between which said lever eye extends with small clearance when in bolted position, and means for adjusting said base and with it the position of said disks for proper registry thereof with the adjusted chuck on the lever.

1'7. The combination recited in claim 16 in which said bed has an inclined cam stop and in which the chuck includes a spring-urged lever having a roller at its outerend operated by said cam stop to tighten the chuck when the lever is in machining position. l

18. In a machine of the character described, a bed, a rocking work transfer lever fulcrumed near its lower end, extending upward through a slot in the bed and having rigidly mounted thereon a spring-closed chuck for resiliently gripping a piece of work to be introduced therein at one end of its stroke, a pair of opposed end milling heads on said bed, cam means for shifting the lever from work pick-up position to alignment of the work between the end milling heads, means for driving said end milling heads, means for firmly gripping the transfer lever in end milling position, means for securely tightening the work in end milling position upon the transfer lever, means for advancing the driven end milling heads into milling relation with the ends of the interposed work and a common source of power for operatin said chuck positioning, chuck tightening and end miller advancing elements in timed relation.

19. In an automatic machine of the type in which work pieces to be end milled are successively transferred to end milling position and securely locked in place throughout end milling operation, the combination of a bed, a transfer lever fulcrumed near its lower end below said bed, and having a spring-closed chuck afiixed upon its upper end, cam means for oscillating said lever from work pick-up position to end milling position, an eye near the upper end of said transfer lever and rigid therewith, means including a latching rod on said bed adapted to plug said eye for fixedly positioning said transfer lever in milling position, a single cam for lockingthe transfer lever and then shifting the end milling heads against the interposed work, said means comprising a bell crank lever having a fixed pivot, a cam follower carried by one arm thereof, the other arm being anchored with respect to the latching rod, a drawbar pivoted to the free end of said cam follower arm, and a pivoted yoke coacting with the end milling head and connected with said drawbar to move said end milling head into engagement with the work after the transfer lever has been locked in fixed position.

20. In a machine of the character described, a bed, a pair of opposed end milling heads thereon, means for driving the latter, a source of stock upon said bed, spaced from said end milling heads, a transfer carriage comprising a lever fulcrumed at its lower end, a chuck fixedly mounted near the upper part of said lever, cam means for operating said lever and the end milling heads in order to pick up a piece of work from the source of stock and axially position it between the end milling heads and means for securing the stock in position and causing the end milling heads to move toward each other-in the end milling operation, said means comprising a cam below the bed, a bell crank lever pivoted below the bed and having a horizontal arm riding on said cam and an upstanding arm, a horizontal latch rod upon said bed, said rod having a head structure coacting with the upper end of said upstanding arm for sliding shift of said rod under the action of said cam, said transfer lever having an eye plugged by said latch rod after said transfer lever reaches milling position, thereby to lock said transfer lever against displacement, a drawbar pivoted at its upper end with respect to the outer part of said horizontal bell crank lever arm, yokes straddling the respective end milling heads, said yokes being pivoted with respect to said bed, and a pair of links connecting said drawbar with respect to the lower extremities of said yokes to cause said yokes to pivot toward each other as the drawbar is moved downward.

21. In apparatus of the character described, a bed, two sets of mutually opposed slidable end milling heads, a source of pins midway between said pairs of end milling heads, means for engaging and transferring alternate pins from said source to position between the respective end milling pairs, means for locking the respective pins in end milling position and for performing the end milling operation, said means comprising a pair of transfer levers, each fulcrumed near its lower end below the bed and each extending upward through a longitudinal slot in the bed, each having a spring-closed chuck afflxed near its upper end, each having an associated operating cam for pivoting the lever from pin take-up position midway between the end milling pairs to end milling position, each of said transfer levers having a latching eye near the upper end thereof,

.an eye latching rod having a slide bearing, means for shifting said rod to locking position when the transfer lever is in end milling position and means for thereupon sliding the opposing end milling heads toward each other for end milling operation, the transfer leverlockingmeans and the end milling carriage, sliding means comprising a cam below the bed, a bell crank lever pivoted below the bed and having a horizontal arm riding upon said cam and an upstanding arm, a socket rigid with said eye latching rod and housing the upper end of said upstanding arm, a drawbarpivoted to the outer end of the horizontal bell crank lever arm, a spring urging said drawbar downward, yokes straddling the respective end milling heads, each yoke being pivoted below the bed and having a stem below said pivot and links connectedbetween the respective yoke stems and and the lower end of the drawbar.

22. In apparatus of the character described, a

workvholding transfer carriage having a latch eye thereon, a latch rod, a bearing frame thereoperating position, said means comprising an adjustment for the position of said bearing frame, a head affixed to said rod and an eccentric hub accommodating said rod in said head.

FELIXW. BRAENDEL. CEC IL o. RICHARDS. 

